5.0
(5)
62
riders
7
rides
Gravel biking around Bionaz offers routes through the Valpelline valley in Italy's Aosta Valley, characterized by an alpine setting at 1600 meters altitude. The region features towering peaks, some reaching 4000 meters, and twenty glaciers feeding alpine lakes. Riders can explore diverse terrain including lush forests, grasslands, and paths along the Place Moulin Dam and its emerald-green lake. This environment provides varied options for gravel biking, from flat lakeside paths to challenging mountain ascents.
Last updated: June 30, 2026
38.8km
05:03
1,550m
1,020m
Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route.
5.0
(3)
29
riders
26.8km
02:17
730m
730m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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3
riders
18.9km
02:30
1,020m
1,020m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
15
riders
28.8km
02:15
670m
670m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
6
riders
18.5km
01:28
560m
560m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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High mountain lake with a dam for electricity production. Beautiful is the view of the Matterhorn, not far away
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The Lo Ditor pond is located at an altitude of 1,900 meters. It is a flat wetland area formed by the Petit Monde stream and surrounded by larch woods. The area is classified as a Special Conservation Area due to the rarity of its habitats, including limestone springs that promote the growth of rare plants. Furthermore, this ecosystem ensures the ideal microclimate for the common frog, which chooses these shallow waters for egg-laying during the thaw.
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Il Prarayer is an alpine plateau located at about 2000 meters above sea level, at the end of the Place-Moulin lake. It is reached by a simple path that runs along the lake, almost always flat. The environment is open, with meadows, small streams, and some alpine pasture buildings. The landscape is surrounded by high peaks and glacial environments, clearly visible in the background. The Rifugio Prarayer is located here, used as a base for longer excursions. The area is suitable for a quiet break after the walk along the lake. Itineraries to side valleys and high-altitude routes start from here. Despite the altitude, the setting remains accessible and not very demanding.
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The Place Moulin dam is a majestic arch-gravity dam, designed to make the most of the narrow and incised conformation of the valley. Its concrete structure develops with a slight curvature, which allows the water's thrust to be transferred to the lateral rock walls, reducing direct pressure on the base and ensuring high stability. With a height of approximately 155 meters and a crest length of over 600 meters, it represents one of the most imposing hydraulic works in the Italian Alps. The artificial basin formed upstream reaches a capacity of over 100 million cubic meters of water, mainly fed by the Buthier stream and glacial meltwater. The plant is an integral part of a hydroelectric system: the accumulated water is conveyed through penstocks to power plants located downstream, where the head is transformed into energy. The management of levels is regulated by surface and bottom outlets, designed to control both floods and ordinary releases.
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The Marmitta dei Giganti in Bionaz is a striking cavity carved into the rock that tells of the power of the alpine glaciers. It formed during the last ice age, when meltwaters, laden with sand and stones, channeled into powerful vortices: the debris, rotating ceaselessly, smoothed the rock to create this deep, almost perfectly shaped "pot". Alongside the scientific explanation, the charm of legend also survives: it is said that giants dug these cavities, using them as containers or leaving their superhuman strength imprinted on them. It is precisely this intertwining of nature and imagination that makes the place so fascinating.
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The Gorza mountain pasture and lake are an ideal destination for those seeking a scenic walk immersed in nature. The mountain pasture offers vast pastures and splendid views of the surrounding mountains, while the nearby alpine lake offers a quiet haven perfect for a relaxing break.
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ski area, even in summer it's a postcard
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It is located inside a beautiful and long path in the woods
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Bionaz features 9 gravel bike trails, providing a variety of options for exploring the Valpelline valley. These routes range from moderate to difficult, catering to different skill levels.
The terrain in Bionaz is quite varied, characterized by its alpine setting. You'll find well-maintained paths through lush forests and grasslands, as well as more demanding ascents into higher alpine landscapes. A notable feature is the flat path along the shores of the emerald-green Place Moulin Lake, offering a different kind of riding experience.
While many routes in Bionaz are rated as difficult, the flat path along the shores of the Place Moulin Lake is particularly suitable for leisurely gravel rides and family outings. Its accessible nature and scenic views make it a great option for those seeking a less challenging experience.
Yes, Bionaz offers several circular gravel bike routes. For instance, the Place Moulin Dam and Lake – Place Moulin Dam loop from Valpelline provides a substantial circular tour. Another option is the Place Moulin Dam – Prarayer Hut loop from Oyace, which is also a popular moderate ring tour.
Bionaz is rich in natural beauty. Along the trails, you can expect to see towering peaks, some reaching 4000 meters, and several alpine lakes fed by glaciers. The impressive Place Moulin Dam and its striking emerald-green lake are central features. You might also encounter the tranquil Lexert Picnic Area and its picturesque mountain lake, or explore parts of the Montagnayes Nature Reserve.
Absolutely. Bionaz is well-suited for advanced gravel bikers. Routes like the Bike trail Becca d'Aver feature significant elevation gain through alpine terrain, providing a demanding experience. Many trails involve challenging climbs towards mountain passes, offering both physical exertion and breathtaking views.
The best time for gravel biking in Bionaz is typically during the warmer months, from late spring to early autumn. This period offers the most favorable weather conditions, with trails generally clear of snow and accessible. The region's high altitude means that some higher routes may remain snow-covered into early summer.
While Bionaz is nestled in a tranquil alpine valley, public transport options exist to reach the area. It's advisable to check local Aosta Valley transport schedules for bus services that connect to Bionaz or nearby towns, which may accommodate bicycles. Planning ahead is recommended due to the remote nature of the region.
Parking is generally available in and around the main village of Bionaz and at popular starting points for trails, such as near the Place Moulin Dam. Specific parking areas may vary by route, so it's best to check the details for your chosen trail beforehand. The Lexert Picnic Area also offers a convenient spot to park and start a ride.
Bionaz and the surrounding Valpelline valley offer various accommodation options, including hotels, guesthouses, and agriturismos. For longer tours, mountain huts and refuges like Prarayer Hut or Rifugio Nacamuli provide welcoming stops and potential overnight stays directly on or near the trails, enhancing the multi-day biking experience.
Bionaz is known for its unspoiled and tranquil environment, offering a peaceful retreat from urban hustle. While specific 'less crowded' trails aren't explicitly designated, the extensive network means you can often find serene sections, especially away from the most popular viewpoints. Exploring the paths through the Montagnayes Nature Reserve can offer a particularly quiet experience.
The gravel biking routes in Bionaz are highly rated by the komoot community, with an average score of 5.0 stars. Riders often praise the stunning alpine scenery, the diverse terrain, and the immersive natural experience. The tranquility and the challenge of the mountain ascents are frequently highlighted as key attractions.
Generally, dogs are permitted on many outdoor trails in the Bionaz region, especially on public paths and forest roads. However, it's always recommended to keep dogs on a leash, especially in nature reserves like Montagnayes, or when passing through grazing areas, to protect wildlife and livestock. Always check specific regulations for any protected areas you plan to enter.
Yes, some gravel bike routes in the broader Bionaz area offer spectacular views towards the Matterhorn. For example, the View of the Matterhorn – Former Cervino Railway loop from Valtournenche is specifically known for its panoramic vistas of this iconic peak, providing a truly memorable backdrop to your ride.


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